I started building linux on Arm architecture and while configuring linux, I had a bad time pointing to a correct qt installation. The problem was that while first try, the environment had a qt installation which was not good one [damn, sysadmin who doesn't care at times, what's lying where], referenced for build. Now everytime, it was trying to pick up the library and never able to create the conf application, which launches "xconfig" GUI window. I tried searching a number of Makefiles, modules which are referencing QTDIR but couldn't get one. As I was a starter atleast for this, I suffered....and couldn't find the solution fast.
Anyways, After giving some more try, I can see that in fact, while building, environment generates .tmp_qtcheck file inside scripts/kconfig. This file is as follows -
KC_QT_CFLAHS=-I${QTDIR}/include
KC_QT_LIBS=-L/usr/qt-3.1/lib.................
KC_QT_MOC=/usr/lib64/qt-3.1/bin/moc
This need to be removed, if you want to provide new QTDIR to the linux build process. Hope it helps.
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